Gas and air mixer



(No Model.)

2 Sheets-Sheet 1.

H. J. BELL;

GAS AND AIR MIXER.

Patented Mar. 26, 1889.

N. Pzrzns. Pnmumm mr, Washinginm ma 2 Sheets-Sheet 2 H. J. BELL.

GAS AND AIR MIXER.

(No Model.)

' No. 400,176. Patented Mar. 26, 1889.

NITED STATES "ATENT OFFICE.

HAROLD .I. BELL, OF GLOUCESTER CITY, NEW JERSEY, ASSIGNOR TO THE YVELSBACH INOANDESCENT GAS LIGHT COMPANY, OF NEIV JERSEY.

GAS AND AIR MIXER.

SPECIFICATION forming part of Letters Patent No. 400,176, dated March 26, 1889.

Application filed September 6, 1888. iSerial No. 284,722. (No model.)

To all whom it may concern;

Be it known that I, HAROLD J. BELL, a citizen of the United States, residing at Gloucester City, in the county of Camden and State of New Jersey, have invented new and useful Improvements in Gas and Air Mixers, of which the following is a specification.

This invention relates to a gas and air mixer for use in connection with a hydrocarbon-gas 1o apparatus or air-carburetor to produce a gas of uniform density, richness, and photometric quality.

The invention consists in the construction and combination of parts in a gas and air 1 5 mixer, as hereinafter described and claimed, whereby the proportionate quantities of gas, carbureted vapor or carbureted air, and uncarbureted atmospheric air admitted into the mixer can be accurately regulated and varied at the will of the consumer from time to time, as required, and whereby a uniform or nearly uniform pressure of gas will be maintained while the apparatus is in use.

In the annexed drawings, illustrating the invention, Figure 1 is a vertical central section of my improved gas and air mixer on the line .2 of Fig. 2. Fig. 2 is a plan of the same. Fig. 3 is a transverse section on the line no a: of Fig. 1. Fig. 4. is a section on the line y y 0 of Fig.

The numeral 1 designates a tank or vessel having a double wall, in which is formed an annular groove or chamber, 2, for receiving mercury to seal a gas-holder, 3, which is sus- 3 5 pended in said annular chamber. In the center of the tank 1 is a vertical tubular guideway, 4, which receives a cylindrical guide-rod, 5, that is secured to the underside of the gasholder top. The gas-holder top is centrally o perforated for passage of the screw-threaded end of a vertical rod or stem, 6, which projects above the gas-holder. This stem or rod 6 is screwed in the upper end of the guide-rod 5, and thereby connects it to the gas-holder.

The rod or stem 6 also serves as a place of attachment for annular weights that may be employed to adjust the pressure of the gas in the tank and holder.

Rising from the bottom of the tank, near one side, are a gas-inlet pipe, 7, and an airinlet pipe, 8, said pipes being side by side and of equal height and diameter, as shown. The pipes 7 and 8 are provided at the top with lugs 9, which project in aninclined direction upward and inward toward the center of the tank. These lugs receive the opposite ends of a transverse rod or shaft, 10, which is centrally supported in the upper end of a standard, 1.1, that rises from the bottom of the tank. The upper ends of the pipes 7 and 8 are con- 6o trolled by a valve, 12, which has a hinged connection with the rod or shaft 10 by means of lugs 13 at each end. This valve 12 is provided on its top with lugs 14, to which is pivoted the end of a lever, 15, which is fulcrumed on the rod or shaft 10, and has its opposite end engaged in a slot, 16, that is formed in the guide-rod 5, the tubular guidewayabeing provided with slots 17, to permit the passage of the lever 15 and afford it sufficient play with the rise and fall of the gas-holder with which it is thus connected. It will be seen that with any variation in the pressure of the gas the rise or fall of the holder 3 will actuate the valve 12, to admit more or less gas and air, and thus restore the pressure to the desired point as determin edbythe weight of theholder.

To the under side of the tank 1, beneath the pipes 7 and 8, is secured, by means of bolts or screws 18, a chambered valve-casing, 19, hav- 8o ing passages which communicate with the lower ends of the gas and air inlet pipes.

Near the opposite ends of the valve-casing are located vertical valve-plugs 20, which are of conical form and held to their seats by springs 21, as shown in Figs. 1 and 3. The lower ends of these valve-plugs 20 project below the valve-casing 19, for the attachment of arms 22, which are pivotally connected by a link, 23, one of said arms being also 0 pivotally connected by a shorter link, 24, with the inner end of a laterally-swinging handlever, 25, which is fulcrumed to a boss, 26, projecting downward from the center of the tankbottom'. This boss 26 is preferably hollow 5 and continuous with the tubular guideway 4, which receives the guide-rod 5 of the gasholder.

The hand-lever 25 carries an index-finger, 27, which will coact with a graduated scale on the tank 1, to indicate the proportionate quantities of gas and air admitted into the machine as determined by the position to which the hand-lever is moved. The valve-plugs 20 have ports of equal size, and are so arranged and connected, as shown, that when the lever 25 is moved to the right or left, as the case may be, one valve will be opened to the same extent that the other is closed, thereby regulating the relative proportions of gas and air admitted into the machine. At no time can a greater volume of gas or vapor or air than will be admitted through one plug-valve wide open, and it will be seen that the gasholder 3 and connected valve 12 will act as a governor to control any variation of pressure or any difference in pressure that may exist between the atmospheric air and the carbureted air, vapor, or gas delivered to the machine. By thus accurately regulating the relative proportions of gas and air in the gas-mixture an illuminating gas of any required density and quality can be produced at will and maintained in a uniform or nearly uniform photometric condition during the time required to consume the charge of the carburetor. The mixture of gas and air is discharged through an outlet-pipe, 28, attached to the tank 1, and projecting up within the gas holder. It will be understood that this gas and air mixer is designed for use in connection with an air-carburetor, gas-generator, or gasoline-machine of suitable kind, and with an air-pump for delivering atmospheric air to the mixer; but as such devices are well known bination, with a tank having gas and air inlet pipes and an outlet-pipe, of a va1ve-casing secured to the bottom of said tank below the inlet pipes, spring-seated valve-plugs located in said casing and adapted to control the proportionate quantities of gas and air admitted into the machine, a hand-lever fulcrumed be neath the tank, and links connecting said lever with the valve-plugs, substantially as described.

2. In a gas and air mixing machine, the combination of a tank having gas and air inlet pipes and an outlet-pipe, a gas-holder resting in said tank, a valve located above the inlet pipes, a lever so connected with said valve and gas-holder that the rise and fall of the gasholder will close and open the valve, so as to control the admission of gas and air into the holder, a valve-casing secured to the bottom of the tank below the inlet-pipes, and valveplugs located in said casing and adapted to control the proportionate quantities of gas and air admitted into the said inlet-pipes, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

H. J. BELL. Witnesses:

HARRY E. BANGROFT, CHAS. D. WAsHBURN. 

